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![[Post New]](/templates/default/images/icon_minipost_new.gif) 27 Dec 2007 22:17:15 IST
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we all know that a freely falling cat always lands on its feet unhurt can anyone of u give a solid explanation for this ???
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Umang |
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27 Dec 2007 22:26:04 IST
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when a cat jumps from the top of a bulilding it's weight(mg) is balanced by drag force..............applied on it by atmosphere....
as drag force is proportional to area so when cat is falling it expands it's legs to increase area........
so by newton's 2nd law if f=0 then a=0
therefore it falls with a uniform velocity called terminal velocity.....
rate if u like !!
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Who says nothing is impossible.
I've been doing nothing for years !!..............
I know KUNG FU KARATE
and 47 other dangerous words.............
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27 Dec 2007 22:35:31 IST
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i hav some doubts
firstly, what is drag force ?
and secondly, someone told me its based on conservation of angular momentum. any idea ???
also, why only for a cat and not for humans ???
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Umang |
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27 Dec 2007 22:42:09 IST
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only for very large heights a cat can protect itself.. not from small heights like trees.. thts y if a cat gets trapped on a tree we need a ladder to get it down... its too scared to jump,.
for large heights,during motion it shifts its centre of gravity so that it becomes right side up as in paws down and head up... in landing position . and just before landing it curves upwards concave like a parachute to use air resistance to lessen the impact of landing plus its paws are highly padded so it lands safely... this is why it is said that cats have nine lives.. most of the times they can save themselves from seemingly fatal falls.
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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27 Dec 2007 22:45:26 IST
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so what netkid said is wrong ???
and is there any role of conservation of angular momentum ?
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Umang |
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27 Dec 2007 22:50:21 IST
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excuse me !!........this is the explanation given in resnick halliday !!
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Who says nothing is impossible.
I've been doing nothing for years !!..............
I know KUNG FU KARATE
and 47 other dangerous words.............
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27 Dec 2007 23:03:25 IST
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yes it uses angular momentum conservation concept... when it needs to control its speed of rotation to set its position right
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* Gaurav Ragtah ( aka Artemis Fowl )
* Agent 'G' [sniper] - SD-6 (Alliance of Twelve)
* Your friendly neighborhood spideyunlimited |
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